Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95d11bc72561c97…

MALICIOUS

PDF

70.6 KB Created: 2020-12-23 03:23:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2ef80a77b3cc4a5cc4ac49fa1b77b0c2 SHA-1: 16f7c0cc783e19243515956b26e7dafe1d579d7d SHA-256: c95d11bc72561c974a8944efc9cb53e16487a3ac19a2de4d3175337482edeef4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The embedded URL, 'https://traffine.ru/strik?utm_term=notification+sounds+not+working+on+note+10', is the primary indicator of malicious intent. The document body, though heavily obfuscated, suggests a lure related to notification sounds, likely to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/strik?utm_term=notification+sounds+not+working+on+note+10 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5fa4360ff2dd9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482645/normal_5fca44d279d6c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4aaabc819f1cf4cebbe2/1606372011085/mass_stoichiometry_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/dod_counterintelligence_awareness_and_reporting_ciar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adb44191-5ce8-4e88-80d8-14b247e57883/fritz_chess_benchmark_scores.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/msvcp140._dll_32_bit_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc32104-6498-4277-8c38-58070b3e7eac/10099757241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ed0a4a-89ec-4297-904e-551604bdb639/gijetutoz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd28e788390d34f381f39e/t/5fdd8da20f6c913d44dccef2/1608355234879/academic_writing_book_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7e7c1a1-7fa0-4daa-99cd-d2a6c86e8a9b/wosiwoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/312b4021-3c66-4dd9-a3e9-032e012f8736/dangal_full_movie_dailymotion.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF5 5360 bytes
SHA-256: 313f072b00ee01209a4a5f7e04ee7fb909c2b28af90d6ca3c26747aed685f9db
font_01_sfnt_off0000dd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5A 10020 bytes
SHA-256: 199eb82e0d78b7556d9b2dc32c2bc5df8a7ff6e5bf11ff924492e61090cef47b
font_02_sfnt_off0000ffb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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